uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/python-modules/leather/default.nix

@@ -0,0 +1,40 @@
+{ lib
+, fetchPypi
+, buildPythonPackage
+, six
+, cssselect
+, lxml
+, nose
+}:
+
+buildPythonPackage rec {
+  pname = "leather";
+  version = "0.3.4";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "b43e21c8fa46b2679de8449f4d953c06418666dc058ce41055ee8a8d3bb40918";
+  };
+
+  propagatedBuildInputs = [ six ];
+
+  checkInputs = [
+    cssselect
+    lxml
+    nose
+  ];
+
+  checkPhase = ''
+    runHook preCheck
+    nosetests
+    runHook postCheck
+  '';
+
+  meta = with lib; {
+    homepage = "http://leather.rtfd.io";
+    description = "Python charting library";
+    license = licenses.mit;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ vrthra ];
+  };
+}